Consolidated Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,837	$ 29,620
Adjustments to reconcile to net cash provided by operating activities:
Provision for loan losses	1,684	314
Depreciation and amortization	3,744	3,143
Net amortization of securities premiums and discounts	(1,948)	(49)
Realized securities losses		14
Gain on sales of loans	(698)	(651)
Cash receipts from the sale of loans originated for sale	43,229	44,558
Cash disbursements for loans originated for sale	(42,094)	(43,949)
Deferred income tax benefit	(459)	(117)
Gain on other assets	(499)	(21)
Increase in interest receivable	(1,500)	(1,111)
Increase in interest payable	382	353
Amortization of stock-based compensation arrangements	174	306
Excess tax benefit from stock-based compensation arrangements	(102)	(647)
Other, net	2,910	(5,408)
Net cash provided by operating activities	36,660	26,355
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid		6,248
Net decrease in federal funds sold		2,451
Purchases of available for sale securities		(30,861)
Proceeds from maturities, calls and paydowns of held for investment securities	210	213
Proceeds from maturities, calls and paydowns of available for sale securities	2,406	5,729
Proceeds from sales of available for sale securities		1,460
Purchase of equity securities	(1,828)
Proceeds from paydowns and sales of equity securities	110
Net change in loans	(67,249)	48,819
Purchases of premises, equipment and computer software	(6,792)	(7,168)
Other, net	(5,019)	(857)
Net cash (used in) provided by investing activities	(78,162)	26,034
FINANCING ACTIVITIES
Net change in deposits	100,582	(31,953)
Net increase/(decrease) in short-term borrowings	3,525	(800)
Issuance of common stock in connection with stock options, net	326	1,290
Cash dividends paid	(9,781)	(6,698)
Net cash provided by (used in) financing activities	94,652	(38,161)
Net increase in cash, due from banks and interest-bearing deposits	53,150	14,228
Cash, due from banks and interest-bearing deposits at the beginning of the period	1,424,255	1,757,875
Cash, due from banks and interest-bearing deposits at the end of the period	1,477,405	1,772,103
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	13,655	7,486
Cash paid during the period for income taxes		1,250
Noncash investing and financing activities:
Stock issued in acquisitions		39,498
Cash consideration for acquisitions		24,722
Fair value of assets acquired in acquisitions		377,320
Liabilities assumed in acquisitions		338,860
Unpaid common stock dividends declared	$ 9,784	$ 6,854